The Port Authority board is set to vote Thursday on a $117.5 million contract to rehabilitate the Trans-Manhattan Expressway after two incidents involving falling debris in May.

The 0.8-mile road runs beneath buildings in Upper Manhattan and connects to the George Washington Bridge’s lower roadway. On May 7, a driver crashed into metal that had fallen from the ceiling. Six days later, officials said a driver was hospitalized after concrete fell onto their car.

The agency made emergency repairs. Port Authority documents say engineers found defects requiring immediate work and an accelerated rehabilitation. The proposed contract would cover concrete, steel joints, beams and walls in a structure that has not had comprehensive rehabilitation since it was built.

If approved, the longer-term work is planned to begin next summer and finish in 2030. Port Authority Executive Director Kathryn Garcia previously attributed the deterioration to repeated freezing and thawing during the winter.